Never had it happen during an emergency but when I was beginning an old clothes assignment my new boss suggested bobbing the hammer on my Colt Cobra. The range guys took care of it and it worked fine when in my waist band or front pocket. Still have the gun and I'm sure the bobbed hammer devalued the Cobra but I don't care. It will never be sold and lots of memories go with that old gun.

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Old Cop
LEO (Ret.)